Thanks for your reply.
Have you tried uploading a Windows mobile project package via the 'Mobile Content Directory'? If you have, you have me beat. I get the following error:
Access to the path 'C:\inetpub\wwwroot\ArcGIS\Mobile\ContentRoot\WindowsMobile\Traffic\8d0eb6cc51804deba573d2f1b7412a65' is denied.
All of my security settings (Admin rights, UNC paths and Authentication) should be correct, yet I get this error? I haven't been able to fix this, and I have a real problem with continually tinkering around looking for a fix, while everything else works fine, including all our web services using Flex.